Episode 521: Murderer, Shinichi Kudo
Scenario: Heiji takes Kazuha, Kogoro, Ran, and Conan to East Okuho after receiving a letter from Makato Okuda addressed to Shinichi; The letter tells Shinichi to meet with him so he could explain Shinichi's deduction mistake from his past investigation. Upon arrival, the group learns that Makato has been missing for over a year; Conan separates from the group and heads to the meeting location disclosed in the letter and is subsequently trapped inside a shed by an unknown culprit. Conan realizes that he mistakenly took the antidote to the APTX 4869 in place of his cold medicine; He escapes through a window and falls into the river before becoming Shinichi again. Heiji and the others find an amnesic Shinichi by a shore; the villagers believe that the Shiragami, a deity living in the forest, cursed Shinichi resulting in his amnesia. Haibara tells Heiji that the antidote would wear off in 24 hours and if Shinichi still retains amnesia even after reverting to Conan, his identity would be exposed. Heiji learns that Shinichi was called to investigate the murder of the mayor and his wife which was concluded to be a forced double suicide. A journalist named Misato Kawuchi threatens to reveal Shinichi's secret if he does not confess to faking his amnesia. The following day, Kawuchi is found with a knife wound with Shinichi beside her holding a knife.
The group believing Shinichi is being framed, hides him from the authorities until they can prove his innocence. Heiji attempts to deduce how the culprit was able to frame Shinichi for the stabbing and believes it is related to the past case Shinichi solved.
Meanwhile, Ran runs into the forest hoping to confront the Shiragami to remove his curse on Shinichi but loses consciousness after falling off a cliff. Ran wakes up in a hut in the woods and discovers someone has treated the wounds from when she fell. Eventually, Kazuha finds Ran and calls Kogoro in. Heiji radios them from the next room. They all go over and find that the room is filled with pictures of Shinichi with knife marks in them. Heiji figures out the case, and they head back to Hinohara's house.